Abstract: The present invention is a universal adapter attachable to the landing gear shaft of a semi-truck trailer to replace the use of manual hand crank handle and facilitate automation of raising and lowering the landing gear. The automation may be electric powered using an electric impact wrench or pneumatic using an air powered impact wrench. The universal adapter significantly eliminates the issues using the existing hand-cranks handle such as back, shoulder, knee and hand injuries and reduce the operation time for raising and lowering a landing gear.

Abstract: The present invention is an electric powered landing gear system for semi-truck trailers using an electric motor supplied by the available voltage in the trailer via a motor controller. The system automates raising and lowering the landing gear. The system comprises a shaft motorized system operated by a 3-phase motor, a DC-to-AC motor controller, and a set of sprockets-and-chain mechanism. The electric motor implements a 3-phase winding and a brushless structure that requires no maintenance compared to direct current motors. The trailer provides the power for the electric motor through the motor controller. The motor controller comprises a digital electronic processor that implements an algorithm to optimize a sensorless control approach providing a variable speed and torque for the motor, and hence to the landing gear system, therefore simplifying the landing gears to a single speed from dual (or multi) speed/gear ratio.

Abstract: The present invention is an electric powered landing gear system for semi-truck trailers using an electric motor supplied by the available voltage in the trailer via a motor controller. The system automates raising and lowering the landing gear. The system comprises a shaft motorized system operated by a 3-phase motor, a DC-to-AC motor controller, and a set of sprockets-and-chain mechanism. The electric motor implements a 3-phase winding and a brushless structure that requires no maintenance compared to direct current motors. The trailer provides the power for the electric motor through the motor controller. The motor controller comprises a digital electronic processor that implements an algorithm to optimize a sensorless control approach providing a variable speed and torque for the motor, and hence to the landing gear system, therefore simplifying the landing gears to a single speed from dual (or multi) speed/gear ratio.

Abstract: The present invention is a universal adapter attachable to the landing gear shaft of a semi-truck trailer to replace the use of manual hand crank handle and facilitate automation of raising and lowering the landing gear. The automation may be electric powered using an electric impact wrench or pneumatic using an air powered impact wrench. The universal adapter significantly eliminates the issues using the existing hand-cranks handle such as back, shoulder, knee and hand injuries and reduce the operation time for raising and lowering a landing gear.